Global Patent Index - EP 1127895 B2

EP 1127895 B2 20150610 - Process for producing powdery water soluble cellulose derivatives

Title (en)

Process for producing powdery water soluble cellulose derivatives

Title (de)

Verfahren zur Herstellung von pulverförmigen wasserlöslichen Cellulosederivaten

Title (fr)

Procédé de préparation de dérivés de cellulose solubles dans l'eau sous forme poudreuse

Publication

EP 1127895 B2 20150610 (DE)

Application

EP 01103518 A 20010216

Priority

DE 10009409 A 20000228

Abstract (en)

[origin: CA2338120A1] The present invention relates to a new, particularly economical process for producing particulate water-soluble cellulose derivatives. The process involves formin g a feed composition of swollen and/or dissolved cellulose derivative, and water. The feed composition is contacted with a carrier and heat exchange gas, in a sieve-fr ee high rotational speed gas jet impact mill, and the cellulose derivative of the fe ed composition is converted into a solid state form of finely particulate particles. The particulate cellulose derivative is then separated from the heat exchange ga s and carrier gas, and optionally dried. The mill drying and the particulate cellulose derivative product are influenced by establishing a specific water content i n the swollen and/or dissolved cellulose derivative.

IPC 8 full level

C08B 1/08 (2006.01); C08B 11/20 (2006.01); C08J 3/12 (2006.01); C08L 1/00 (2006.01)

CPC (source: EP KR US)

C08B 1/08 (2013.01 - KR); C08B 11/20 (2013.01 - EP US); C08J 3/12 (2013.01 - EP US); C08L 1/00 (2013.01 - EP US); C08J 2301/08 (2013.01 - EP US)

Citation (opposition)

Opponent :

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

DOCDB simple family (publication)

EP 1127895 A1 20010829; EP 1127895 B1 20060510; EP 1127895 B2 20150610; AT E325818 T1 20060615; BR 0100690 A 20011009; CA 2338120 A1 20010828; CN 1267454 C 20060802; CN 1311258 A 20010905; DE 10009409 A1 20010830; DE 50109727 D1 20060614; DK 1127895 T3 20060911; DK 1127895 T4 20150629; ES 2263520 T3 20061216; HK 1039948 A1 20020517; HK 1039948 B 20070316; JP 2001240601 A 20010904; JP 2012229428 A 20121122; JP 5921976 B2 20160524; KR 100742030 B1 20070723; KR 20010085676 A 20010907; MX PA01002094 A 20021023; NO 20010976 D0 20010227; NO 20010976 L 20010829; PL 346108 A1 20010910; RU 2291155 C2 20070110; TW I234566 B 20050621; UA 73478 C2 20050815; US 2001034441 A1 20011025; US 6509461 B2 20030121

DOCDB simple family (application)

EP 01103518 A 20010216; AT 01103518 T 20010216; BR 0100690 A 20010221; CA 2338120 A 20010223; CN 01108950 A 20010228; DE 10009409 A 20000228; DE 50109727 T 20010216; DK 01103518 T 20010216; ES 01103518 T 20010216; HK 02101481 A 20020226; JP 2001045076 A 20010221; JP 2012149456 A 20120703; KR 20010010051 A 20010227; MX PA01002094 A 20010227; NO 20010976 A 20010227; PL 34610801 A 20010226; RU 2001105298 A 20010227; TW 90103744 A 20010220; UA 2001021331 A 20010226; US 78811601 A 20010216